£37.99
In stock
9907 in stock
Protect floors, concrete slabs and building structures against ground moisture and rising damp with this heavy duty BBA Certified Damp Proof Membrane (DPM).
Manufactured from durable 250 micron / 1000 gauge polythene, this waterproof membrane creates an effective barrier against moisture beneath concrete floors, screeds, slabs and other ground-bearing floor constructions.
Supplied in a generous 4m x 25m roll, each membrane provides approximately 100m² of coverage before allowing for overlaps, making it an excellent choice for extensions, garages, new builds, commercial projects and general construction work.
At 1000 gauge / 250 micron / 0.25mm thick, this DPM provides a substantial and durable moisture barrier suitable for demanding building applications.
The heavy duty polythene construction combines strength with flexibility, allowing the membrane to be positioned across large floor areas and formed around corners and construction details.
For customers searching for 1000 gauge DPM, 250 micron damp proof membrane, heavy duty damp proof membrane or BBA certified DPM, this product provides a dependable professional solution.
This DPM is BBA Certified, providing additional reassurance that the product has been independently assessed for use within appropriate building applications.
BBA certification is particularly valuable for professional builders, contractors and specifiers looking for a damp proof membrane with recognised third-party certification.
Combined with its CE certification and heavy duty 250 micron construction, this membrane is an excellent choice for both domestic and commercial building projects.
Ground moisture can travel upwards into a building through concrete and other porous construction materials if an effective moisture barrier is not installed.
A properly installed damp proof membrane creates a continuous waterproof layer between the ground and the floor construction.
This helps protect the building against:
This 1000 gauge DPM is suitable for a wide range of construction applications, including:
Each roll measures 4 metres wide by 25 metres long, providing approximately 100 square metres of material before allowing for overlaps and detailing.
The large 4m width can help reduce the number of separate joints required across larger floor areas.
This makes the membrane particularly useful for:
Fewer joints can also make it easier to create a continuous damp-proof barrier when the membrane is correctly installed and sealed.
Polythene membrane thickness is commonly described using either gauge or microns.
For this product:
1000 Gauge = 250 Micron = approximately 0.25mm
Gauge is the traditional imperial measurement commonly used within the building industry, while micron is the modern metric measurement.
A higher gauge or micron figure indicates a thicker sheet.
At 250 microns, this product is classed as a heavy duty polythene membrane suitable for demanding damp-proofing and construction applications.
The membrane is manufactured from tough polythene, creating a waterproof barrier that is both durable and flexible.
Its flexibility makes the DPM easier to form around:
while the heavy duty thickness provides greater resistance to accidental damage than lightweight polythene sheeting.
One of the most common applications for a DPM is beneath concrete ground floors and slabs.
The membrane is positioned within the floor construction to prevent moisture from the ground travelling upwards into the finished building.
Depending on the floor specification, the DPM may be incorporated alongside:
Correct positioning should always follow the project specification and relevant building requirements.
Moisture passing through a floor can cause problems long after construction has been completed.
Excess moisture may damage:
Installing a suitable damp proof membrane helps isolate these materials from moisture rising from the ground.
This membrane has a listed watertightness greater than 2kPa, helping provide effective protection against water and moisture when correctly installed.
Maintaining a continuous membrane without unsealed joints or punctures is essential for obtaining the intended waterproof performance.
The DPM is listed as resistant to low temperatures down to approximately -25°C.
This helps provide durability during storage, installation and building applications exposed to colder conditions.
Persistent moisture can create favourable conditions for mould and fungal growth.
By helping prevent ground moisture reaching floor construction and internal building materials, a correctly installed DPM can contribute to a drier building environment and reduce the risk of moisture-related problems.
Correct installation is essential to create an effective continuous moisture barrier.
When installing:
Always install the membrane in accordance with the project specification and applicable building requirements.
Although both products protect buildings against damp, a DPM and DPC perform different roles.
A Damp Proof Membrane (DPM) is generally supplied as a wide sheet and installed beneath floors, slabs and other horizontal building elements.
A Damp Proof Course (DPC) is normally supplied as a narrower roll and installed within masonry walls.
Connecting the DPM correctly to the DPC where required helps create a continuous barrier against ground moisture.
The substantial 250 micron construction means this membrane may also be useful for temporary heavy duty protection on building sites.
Potential additional uses include:
Where the product is being used for anything other than its primary damp-proofing purpose, ensure it is suitable for the intended application.
The large 100m² roll is suitable for both professional contractors and larger DIY building projects.
It is particularly useful for:
Choose this BBA Certified Damp Proof Membrane 1000 Gauge / 250 Micron – 4m x 25m for a heavy duty, dependable and professional moisture barrier suitable for floors, concrete slabs, extensions, garages and a wide range of building projects.
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